Monte Carlo simulation on n-γ density logging using D-T neutron generator

He Xiongying; Zheng Shiping; Lu Xiaolong; Yao Zeen

doi:10.3788/HPLPB20132501.0253

Volume 25 Issue 01

Dec. 2012

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Article Navigation > High Power Laser and Particle Beams > 2013 > 25(01): 253-258

Liu Wufeng, Huang Jijiang, Qiao Weimin, et al. Spot scanning control system for heavy ion therapy[J]. High Power Laser and Particle Beams, 2014, 26: 015105. doi: 10.3788/HPLPB201426.015105

Citation:

He Xiongying, Zheng Shiping, Lu Xiaolong, et al. Monte Carlo simulation on n-γ density logging using D-T neutron generator[J]. High Power Laser and Particle Beams, 2013, 25: 253-258. doi: 10.3788/HPLPB20132501.0253

Liu Wufeng, Huang Jijiang, Qiao Weimin, et al. Spot scanning control system for heavy ion therapy[J]. High Power Laser and Particle Beams, 2014, 26: 015105. doi: 10.3788/HPLPB201426.015105

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Monte Carlo simulation on n-γ density logging using D-T neutron generator

doi: 10.3788/HPLPB20132501.0253

1.
School of Nuclear Science and Technology,Lanzhou University,Lanzhou 730000,China;
2.
China National Petrol Corporation Logging,Xi’an 710061,China;
3.
Engineering Research Center for Neutron Application,Ministry of Education,Lanzhou University,Lanzhou 730000,China

Received Date: 2012-06-26
Rev Recd Date: 2012-07-18
Publish Date: 2013-01-15

Abstract

Abstract

D-T neutron source model is developed according to the neutron spectrum and the neutron angular distribution of D-T reaction. A standard calibration well model is built. The transports of D-T neutron and -ray in the well are simulated using MCNP code. Mixed -spectrum and inelastic -spectrum in the NaI detector are obtained for different distance and different density. The data of the mixed gamma count in the energy range of 2.5 to 4.5 MeV as a function of distance show that the detector should be located in the space of 20-80 cm. The nonlinear relationships between the density and the mixed gamma count are presented. The data of the inelastic gamma count in the energy range of 1.0 to 8.0 MeV as a function of distance show that the detector should be located in the space of 20-40 cm or in the neighborhood of 80 cm. The relationships between the density and the inelastic gamma count can be approximatively expressed as a linear function.
- density logging,
- D-T neutron generator,
- Monte Carlo simulation,
- limestone,
- gamma energy spectrum

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